Null object if entity not found

Question

I'm working with Hibernate and JPA. I have an entity called `Customer` that references a `ParentCustomer`: ``` public class Customer { @Id @GeneratedValue @Column(name = "CustomerID") private int id; @ManyToOne @JoinColumn(name = "ParentCustomerID") private Customer parent; // ... } ``` But in my db there are some customers that have no parent so the `ParentCustomerID` is set to `0`. The exception I get when I test my class is: `javax.persistence.EntityNotFoundException: Unable to find it.keyforup.pat.data.entities.Customer with id 0` Is there a way to set the `ParentCustomer` to `null` when id is `0`?

Accepted Answer

Try this

```
@ManyToOne
@JoinColumn(name = "ParentCustomerID")
@NotFound(action = NotFoundAction.IGNORE)
private Customer parent;
```

Null object if entity not found

Solution

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